Sphygmomanometer.



P. NICHOLSON.

SPHYGMOMANOMETER. APPLIGATION FILED FEB.7,1913.

Patented Nov. 4, 1913.

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P. NICHOLSON.

SPHYGMOMANOMETER. APPLICATION FILED 1113.7, 1913.

' Patentd. N011.4,1913.

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I accom pa nyiug drawings PERCIVAL NIQHOLSON, 0F ARDMOZRE, PENNSYLVANIA.

A SPHYGMOMANOMETER.

Specification of Letters Patent. 4

Patented Nov. 4, 1913.

Application filed February 1, ms. Serial no. 746,789.

To all whom it may concern:

Be it known that I, PEROIVAL NICHOLSON, a citizen of the United States, State of tain Improvements in My invention relates to improvements in sphygmomanometers designed to render t e apparatus more compact, convenientand efficient. In its preferred form it comprises a cistern connected with a fluid with patient obliterated, in combination with a tube hinged to said first tube by a valve mechanism whereby said tubes can be brought into an, adjustable scale having a hinged section whereby the liquid column in said tube or tube sections can be read and the hinged scale section. can be folded upon the complementary scale section, and a case having a lid by which the foregoing parts are supported.

This apparatus provides the desiderata that it can be incased within a comparatively small compass, that the connection of the up per tube or tube section with the lower tube or tube section by the combined valve and hinge provides for connecting the sections in tion, and that a comparatively long and uniformly graduated scale can be used by reason of the adjustable aractor of the parts, with the provision of reliable as well as convenient means for determining blood pressure.

The characteristic improvements of my invention will more fully appcar'by reference to the following descriptihnand the in illustration thereof. r v

In the drawings, Figure 1 is a perspective view of a form of apparatus embodying my l invention Fig. 2 is a sectional view ofthe same with the case closed and the hinged parts folded therein, Fig. 3 is a transverse 0 the apparatus shown a sectional View taken through the passage of I the valve,

residing at Ardmore, in the county of Montgomery and Pennsylvania, have invented cer- Sphygmomanometers, of which the following is a specification.

4 is a longitudinal-secof thevalve mechanism, Fig. 5 is taken on the line 55 of lg. 4, Fig. 6 is a top planin Fig. 1 with the sections of the mercury tube and scale d, Fig. 7

Is an elevation showing a isection of apparatus embodying modified details. of construction, Fig. 8 View of the a :the top section of the mercury tube and tube and having .view taken through the axis shown in Fig. 'tions in 'aliuement, Fig.

1s a top p paratus shown in Fig. 7 with Fig 9 is a vertical sectional of the valve 7 with the mercury tube seeis a view similar to that of Fig. 9 with the top section of the mercury tube folded, and Fig. 11. is a perspective view of the valve casing.

he apparatus, as illustrated in ings, comprises the case 1 having the lid 1 hinged 'by th The bottom of the case is provided with thestop 1: for engaging the bottom of the lid 1 when the latter is in the lid is provided with the strut or latch 1 for positively engaging the. spring hasp 1" to hold the bottom of the lid in firm position against the stop 1.

. The lid has secured to itsinncr side the t e flexible tube 4 of the pneumatic cufl 5 and the flexible tube 6 of the air pump 7. The end of the tube 2 opposite the valve 3 is coupled by a rubber tube 8 with the neck 9 of a glass cistern 10 having a capillary tube 9 extending downwardly into it from the neck .9, and the bottom of the cisterntube or tube by a keeper 12'. r I

In the form of the invention illustrated in Figs. 1 to 6, inclusive, the top of the tube section 12 is set in the valve 16 having the in casing 14 by the vertical position and the i of the mercury in tube sections'12' and 12 are held in alinement, communicating through the registering passages 27 and 28", which position is maintained by the engagement of the section 12 in the socket or hearing 27 and the action of the spring 30 through the bolt 31 on the valve 28. When not in use, the parts 12 and 23 are folded to their position in Figs. 8 and 10 in which position the valve 28 closes the passage- 27, the folding of the. part 12 having turned the valve 28 which has been moved outwardly in the casing 27 by the action of the cam 27 against the action of the spring 30. This spring holds the folded tube 12 in the socket 27.

Having described my invention, 1 claim:

1. The combination of a cistern, a tube section having a bend connected with said cistern, a second tube section, means comprising a valve whereby said second tube section is hinged to said tube section first named and communication between said sections is controlled, and a scale for reading the height of a liquid column in either of said sections.

2. The combination of a cistern,'a' tube section connected with said cistern, a valve casing connected with an end of said tube section, a valve journaled in said casing, said valve having apassage adapted'for communicating with said tube and a socket in communication with said passage, and a tube section having an end seated in sai last named socket,,

adapted to turn therewith in the circular aperture 19 of the casing, receives an end. of the glass tube section 12 (having a funnel or open bowl top 12) which is, when in the erected position, in communication with the section 12. The passage 20 through the valve 16 communicates at all times with the section 12 and with the section when section 12 is substantially parallel thereto or in the erected position. But when section 12 is folded or in the position shown in Figs. 2 and 6, the valve 16 closes the top or outer end of the section 12. A spring pressed dog 21 is tulcrumed onthe casing 14:, the jaw 21 or" the dog being adapted forengaging the recesses 22 and 22 of the valve to hold it in its respective positions, with the section 12 in communication with the section 12 and in folded relation thereto. The scale comprises the sections 23 and 23 connected by the hinge 24. The section 23 contains the T-slot 25, and T-clips 26, fixed to the lid 1, engage the scale section to the lid, the clips having the resilient wings 26 which frictionally engage the scale section within the slot so that such section is adjustable and normally held in position thereby. V

W'hen the apparatus is not in use, the parts occupy the position shown in Fig. 2. When in use, the parts 1, 12 and 23 are in the vertical position, the scale isadjusted so that its datumcorresponds to the level the mercury tube, the cuff is applied, and the pump is operated until the pulse is obliterated when the reading of the column of mercury by thescale will indicate the blood pressure.

In the form of the invention illustrated in Figs. 7 to 11 inclusive, the lid 1 has fixed to its inner side the valve casing 27 provided with the fenestrated socket 27 in which is engaged the outer end of the tube ,12. A cylindrical 'valve 28, movable in the casing 27, is provided with the fenestrated socket 28 which receives an end of the tube 12. The bore of this tube registers with the valve passage 28 which is adapted to register with the bore of the tube 12 through the casing passage 27". A bearing29, fixed in the casing, supports a coiled spring 30 which said valve acting as a hinge for said second tube section and serving to close said first named tube section.

3. The combination of a case havinga hinged lid, a cistern and tube connected by a bend and connected to the inside of saidlid, a second tube, and valve mechanism whereby said tubes are connected and said second tube is hinged in relation to said first tube.

4. The combination of a case having a hinged lid, a cistern and a tube communi-' eating therewith and fixed within said lid, a second tube adapted to communicate wit said first tube and means whereby said second tube is hinged with relation to said first tube and the communication between said tubes is controlled.

a cistern, a tube engages a bolt 31 movable through the bear- 5. The combination of ing and fixed in the valve. The casing 27 communicating therewith, a second tube valve 28 outwardly from the position is provided with the sockets 27 and 27 which are adapted for engaging the tube 12 in its erected and folded positions, the sockets being connected by the cam surface 27 adapted for moving the tube 12 and the shown a valve journaled in said casing, said valve in Fig. 9 to that shown in Flg. 10'.

The scale section 23 is connected to the lid 1 and to the section 23 as previously described. It will be understood that the parts of this form of the apparatus'are shown in. opera tive position in Figs. 7 and 9, in whic the use 10 an end of said turf,

having a device thereon for engaging-arr end of said second tube and a passage whereby said tubes are adapted to be connected, and

a scale having hinged sections disposed in 5 proximity to said tubes when the-latter are in communication;

. he combination of a cistern, a tube aving a bend connected therewith, a valve casing having a nestrated socket in vvhich e combination of e cistern, a tube having a bend connected therewith, a second connected, the second tube can be moved relative to the first and the first tube can be closed. t V

In testimony whereof I have hereunto set my hand this 5th day of February, 1.913, in t e presence of the subscribing Witnesses.

15 be connected, means whereby said valve is tubes is controlle PERCIVAL NICHOLSQN. 20 8. .e combination of a cistern, a tube Witnesses:-

having a bend connected therewith, avalve CHARLES N, BUTLER,

casing having a socket in which an end of Gno A. CUNNEY.

N oggles ct this patent may be obtained for five cents each, by addressing the Commissioner o! Patents,

- Washington, D. G.

tube, and meanscomprising a fenestrated 

